/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.    
 */
package org.apache.xmlrpc.util;

import java.text.FieldPosition;
import java.text.ParsePosition;
import java.util.Calendar;
import java.util.Date;

/**
 * An extension of {@link XmlRpcDateTimeFormat}, which accepts and/or creates
 * instances of {@link Date}.
 */
public abstract class XmlRpcDateTimeDateFormat extends XmlRpcDateTimeFormat {
	private static final long serialVersionUID = -5107387618606150784L;

	public StringBuffer format(Object pCalendar, StringBuffer pBuffer,
			FieldPosition pPos) {
		final Object cal;
		if (pCalendar != null && pCalendar instanceof Date) {
			Calendar calendar = Calendar.getInstance(getTimeZone());
			calendar.setTime((Date) pCalendar);
			cal = calendar;
		} else {
			cal = pCalendar;
		}
		return super.format(cal, pBuffer, pPos);
	}

	public Object parseObject(String pString, ParsePosition pParsePosition) {
		Calendar cal = (Calendar) super.parseObject(pString, pParsePosition);
		return cal == null ? null : cal.getTime();
	}
}
